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Senior Software Engineer

numi · City Of London, England, United Kingdom

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Senior Product EngineerLondon / HybridThe OpportunityTraditional insurance reacts to accidents after they happen. This fast growing scale-up is changing the narrative by using real time, data driven insights to prevent them entirely.With nearly one billion connected, insured miles and over £50M in funding, they are building the definitive insurance platform for the next generation of global delivery, logistics, and ride hailing networks.As they enter their next phase of growth, the business is expanding its core platform capabilities. This role sits within a highly strategic team responsible for engineering the systems that bring entirely new fleets, brokers, and industry sectors onto the platform.As a Senior Fullstack Engineer, you will take ownership from end to end, designing, deploying, and measuring the impact of features that directly unlock new commercial opportunities. You'll balance complex backend architecture with intuitive user experiences while helping shape the future of the platform.What You'll Be DoingYou will work within a sophisticated, highly asynchronous technical ecosystem, leading features from initial concept through to production.Your responsibilities will include:Backend DevelopmentBuild and maintain backend services using TypeScript.Work on event-driven systems that help different parts of the platform communicate.Develop features across areas such as pricing, underwriting, brokers, vehicles, invoicing, and finance.Frontend DevelopmentBuild and improve an internal application using React and TypeScript.Create simple tools that help internal teams set up products and manage configurations.Make complex processes easy for non-technical users to use.Cloud & AWSDevelop and support applications running on AWS, including Lambda, API Gateway, S3, EventBridge, SQS, and CloudWatch.Help improve the reliability, performance, and monitoring of the platform.What They're Looking ForThe team values practical, collaborative engineers who care deeply about system design, code quality, and the commercial impact of their work.They are looking for individuals who enjoy solving complex domain modelling challenges and thrive in a culture of continuous technical improvement.Why Join?This is an opportunity to join a mission driven scale-up where engineering excellence directly drives business growth and your technical decisions have immediate visibility and impact.Benefits & PerksOwn the systems driving the commercial expansion of a platform transforming global road safety.Dedicated learning and development support, including an annual personal development budget, funded qualifications, and paid learning days.Comprehensive private medical insurance covering dental, optical, and mental health support.Flexible salary sacrifice schemes for workplace nursery, gym memberships, technology purchases, and electric vehicles.Enhanced parental leave policies.Modern, flexible working culture with a central London office hub.High levels of technical autonomy, psychological safety, and career development opportunities.